December 2010
Intermediate to advanced
451 pages
11h 16m
English
Content preview from Oracle and PL/SQL Recipes: A Problem-Solution Approach
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9-3. Creating and Raising Named Programmer-Defined Exceptions
Problem
You want to alert the users of your application when a specific event occurs. The event does not raise an Oracle exception, but it is rather an application-specific exception. You want to associate this event with a custom exception so that it can be raised whenever the event occurs.
Solution
Declare a named user-defined exception, and associate it with the event for which you are interested in raising an exception. In the following example, a user-defined exception is declared and raised within a code block. When the exception is raised, the application control is passed to the statements contained within the exception handler for the named user exception.
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